Piezoelectric bimorph type acceleration sensor

Details Piezoelectric bimorph type acceleration sensor Piezoelectric bimorph type acceleration sensor

1994-03-18

1996-05-14

Williams, Hezron E.

Measuring and testing

Vibration

Mechanical impedance

310321, G01P 1509

Patent

active

055157254

ABSTRACT:
An acceleration sensor includes a sensor body obtained by forming first and second signal electrodes on outer major surfaces of first and second piezoelectric ceramic plates which are pasted to each other through an intermediate electrode. The sensor body is formed to be mechanically supported in the form of a center beam, and has first to third regions formed so that stress is caused in different directions in adjacent ones of the first to third regions upon acceleration. The first and second piezoelectric ceramic plates are polarized in opposite directions in the second region so that charges which are opposite in polarity to charges generated in the second region are not drawn from the signal electrodes in the first and third regions.

REFERENCES:
patent: 2614416 (1952-10-01), Hollmann
patent: 3233466 (1966-02-01), Shaw, Jr.
patent: 3304787 (1967-02-01), Chiku
patent: 4431935 (1984-02-01), Rider
patent: 4435737 (1984-03-01), Colton
patent: 4689992 (1987-09-01), Strachan
patent: 5088326 (1992-02-01), Wada et al.

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